sql_io.py: Added ExcToErrorsTable, which separates out the errors table inserting code from the exception handling code. data_exception_handler(): Refactored to use new sql_gen.data_exception_handler() and ExcToErrorsTable.
sql_io.py: Added ExcToErrorsTable, which separates out the errors table inserting code from the exception handling code. data_exception_handler(): Refactored to use new sql_gen.data_exception_handler() and ExcToErrorsTable.